in the family. There are millions of rows. Each operation consists of
doing a batch_insert through pycassa, which increments ~17k keys. A
majority of these keys are new in each batch.
Each operation is taking up to 15 seconds. For our system this is a
significant bottleneck.
Try to
I have a patch for trunk which I just have to get time to test a bit before I
submit.
It is for super columns and will use the super columns timestamp as the base
and only store variant encoded offsets in the underlying columns.
Could you please measure how much real benefit it brings (in
I'm pleased to announce the release of Cassandra 0.7.9.
0.7.9 contains a number of important bug-fixes (full list here[1]),
and should be an easy upgrade from previous 0.7 releases.
Source and binary distributions are available from the Downloads
page[3], and users of Debian and derivative
Hi Martin
Yes that was helpful, thanks
(I had no idea you were reading the Cassandra users list! :-) )
Thanks, (Kaj) Magnus L
On Mon, Sep 5, 2011 at 10:57 PM, Martin von Zweigbergk
martin.von.zweigbe...@gmail.com wrote:
Hi Magnus,
I think the answer might be on
Sorry for the newbie question but I failed to find a clear answer.
Can CQL be used to query a schema-less column family? can they be indexed?
That is, query for column names that do not necessarily exist in all
rows, and were not defined in advance when the column family was
created.
Thank you
Hi All,
I am using Cassandra-0.7.8 on cluster of 4 machines. I have uploaded some files
using Map/Reduce.
It looks files got distributed only among 2 nodes. When I used RF=3 it had got
distributed to equally 4 nodes on below configuration.
Here are some config info's:
1.
switch to random (hash) partitioner
OR
move tokens from your empty nodes into different position in ring; split
your full nodes in half. ring will then look like: owns 14% 14% 14%
rest of ring.
https://github.com/edwardcapriolo/casbase
What is it?
There are many great articles about building secondary Cassandra indexes
such as http://www.anuff.com/2011/02/indexing-in-cassandra.html. In a
nutshell, index building boils down to turning a single insert into multiple
inserts to support
In general, more smaller is better than fewer big. Probably go for
what's cost-effective.
Cost effective solution is few and fat servers because it also saves hosting
cost.
The exception to that would be if you're truly only caring about
writes and have *very* few reads that are not latency
There is a link to a page which lists few professional support providers on
Cassandra homepage. I have contacted few of them and couple are just out of
providing support and others didn't reply. So, do you know about any
professional support provider for Cassandra solutions and how much they
We use Datastax (http://www.datastax.com) and we have been very happy
with the support we've received.
We haven't tried any of the other providers on that page, so I can't
comment on them.
Jim
(Disclaimer: no connection with Datastax other than as a satisfied customer.)
On Tue, Sep 6, 2011 at
I also have used datastax with great success (same disclaimer).
A specific example:
-I setup a one-on-one call to talk through an issue, in my case a server
reconfiguration. It took 2 days to find a time to meet, though that was my
fault as I believe they could have worked me in within a day. I
Thanks for sharing the info.. though I contacted datastax using contact form
but no reply yet after more than a week.
Probably I need to contact Ben directly.
From: Ben Coverston ben.covers...@datastax.com
To: user@cassandra.apache.org
Sent: Tuesday, September
Hi,
Is there any suggested way of calculating number of nodes needed based on data?
We currently have 6 nodes (each has 8G memory) with RF5 (because we want to be
able to survive loss of 2 nodes).
The flush of memtable happens around every 30 min (while not doing compaction),
with ~9m
Mongodb, last time I looked does not scale horizontally.
I've seen reasonable behavour putting Cassandra database tables onto
remote filers, but you absolutely have to test against the SAN
configuration and carefully manage things like concurrent reader/writer
settings, the fs and cassandra
Since we finally fixed this issue, I thought I'd document the
solution, with the hope that it makes it easier for others who might
run into it.
During the time this issue was occurring Anthony Ikeda reported a very
similar issue, although without the strange pattern of occurrences we
saw:
Thanks for the followup, Jim!
We'll review https://issues.apache.org/jira/browse/CASSANDRA-3142 shortly.
On Tue, Sep 6, 2011 at 2:58 PM, Jim Ancona j...@anconafamily.com wrote:
Since we finally fixed this issue, I thought I'd document the
solution, with the hope that it makes it easier for
Jonathan, do you know when 0.8.5 will be released? We are looking at a
production deployment soon and this fix is something that we would need.
Alternatively, what is the stability of the trunk for a production
deployment.
Anthony
On Mon, Sep 5, 2011 at 3:35 PM, Evgeniy Ryabitskiy
0.8.5 is being voted on now on the dev list. I'd encourage you to test it.
I do not recommend running trunk.
On Tue, Sep 6, 2011 at 5:32 PM, Anthony Ikeda
anthony.ikeda@gmail.com wrote:
Jonathan, do you know when 0.8.5 will be released? We are looking at a
production deployment soon and
Thanks Jonathan, I'll consult with the team.
Anthony
On Tue, Sep 6, 2011 at 3:34 PM, Jonathan Ellis jbel...@gmail.com wrote:
0.8.5 is being voted on now on the dev list. I'd encourage you to test it.
I do not recommend running trunk.
On Tue, Sep 6, 2011 at 5:32 PM, Anthony Ikeda
Do you have a link to the downloadable?
Anthony
On Tue, Sep 6, 2011 at 3:38 PM, Anthony Ikeda
anthony.ikeda@gmail.comwrote:
Thanks Jonathan, I'll consult with the team.
Anthony
On Tue, Sep 6, 2011 at 3:34 PM, Jonathan Ellis jbel...@gmail.com wrote:
0.8.5 is being voted on now on
It's linked from the vote thread:
http://mail-archives.apache.org/mod_mbox/cassandra-dev/201109.mbox/%3ccakkz8q12k2o7zm5uy9hxnk7kyesqidwcyxbq_uzfna+yaty...@mail.gmail.com%3E
On Tue, Sep 6, 2011 at 5:41 PM, Anthony Ikeda
anthony.ikeda@gmail.com wrote:
Do you have a link to the downloadable?
I ran into this problem today. It's common enough that it shows up in google,
but not common enough to have a documented resolution, so here's one.
[junit]
com.google.common.collect.ImmutableSet.copyOf(Ljava/util/Collection;)Lcom/google/common/collect/ImmutableSet;
[junit]
Thanks Jonathan.
On Tue, Sep 6, 2011 at 3:53 PM, Jonathan Ellis jbel...@gmail.com wrote:
It's linked from the vote thread:
http://mail-archives.apache.org/mod_mbox/cassandra-dev/201109.mbox/%3ccakkz8q12k2o7zm5uy9hxnk7kyesqidwcyxbq_uzfna+yaty...@mail.gmail.com%3E
On Tue, Sep 6, 2011 at 5:41
I pulled the latest code from
github 3e77792d31344be0253c89355c1d96ffe03c0659
and used my old commands to create a regular KS, and it failed.
quick debugging shows that the client hits an NPE somewhere.
am I missing some new mandatory args ?
Thanks
Yang
[default@unknown] connect
ok, it seems that the '[ ]' should not be there now
On Tue, Sep 6, 2011 at 4:56 PM, Yang tedd...@gmail.com wrote:
I pulled the latest code from
github 3e77792d31344be0253c89355c1d96ffe03c0659
and used my old commands to create a regular KS, and it failed.
quick debugging shows that
Hi,
I have just started the process of upgrading Cassandra from 0.7.2 to 0.8.4,
and I am facing some issues with embedded cassandra that we utilize in our
application.
With 0.7.2, we define our keyspace in cassandra.yaml and use Hector to give
us an embedded cassandra instance loaded with schema
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